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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _NF_TABLES_IPV6_H_
#define _NF_TABLES_IPV6_H_
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <net/ipv6.h>
static inline void
nft_set_pktinfo_ipv6(struct nft_pktinfo *pkt,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
unsigned int flags = IP6_FH_F_AUTH;
int protohdr, thoff = 0;
unsigned short frag_off;
nft_set_pktinfo(pkt, skb, state);
protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags);
if (protohdr < 0) {
nft_set_pktinfo_proto_unspec(pkt, skb);
return;
}
pkt->tprot_set = true;
pkt->tprot = protohdr;
pkt->xt.thoff = thoff;
pkt->xt.fragoff = frag_off;
}
static inline int
__nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
#if IS_ENABLED(CONFIG_IPV6)
unsigned int flags = IP6_FH_F_AUTH;
struct ipv6hdr *ip6h, _ip6h;
unsigned int thoff = 0;
unsigned short frag_off;
int protohdr;
u32 pkt_len;
ip6h = skb_header_pointer(skb, skb_network_offset(skb), sizeof(*ip6h),
&_ip6h);
if (!ip6h)
return -1;
if (ip6h->version != 6)
return -1;
pkt_len = ntohs(ip6h->payload_len);
if (pkt_len + sizeof(*ip6h) > skb->len)
return -1;
protohdr = ipv6_find_hdr(pkt->skb, &thoff, -1, &frag_off, &flags);
if (protohdr < 0)
return -1;
pkt->tprot_set = true;
pkt->tprot = protohdr;
pkt->xt.thoff = thoff;
pkt->xt.fragoff = frag_off;
return 0;
#else
return -1;
#endif
}
static inline void
nft_set_pktinfo_ipv6_validate(struct nft_pktinfo *pkt,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
nft_set_pktinfo(pkt, skb, state);
if (__nft_set_pktinfo_ipv6_validate(pkt, skb, state) < 0)
nft_set_pktinfo_proto_unspec(pkt, skb);
}
extern struct nft_af_info nft_af_ipv6;
#endif
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